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  1. Can you recommend a tube tester?
  2. 6550 tube protection socket
  3. PT laminations are usable as OT laminations ?
  4. Are These Authentic Russian Military 1578 Vacuum Tubes?
  5. Amp ID Please
  6. Help for Main Transformer Spec for CCDA
  7. Switching SE and balanced inputs/outputs
  8. kt88 PP rectifier.
  9. How much Blue glow is ok?
  10. Recommendations on How To mono a pre amplifier?
  11. 6H6pi curves available?
  12. 1p24b
  13. help, Built from scratch Kalamazoo 2 noise
  14. 5CZ5/5BQ7A single ended amp
  15. Hopefully a simple question.
  16. 211 tube recommendations
  17. Need HELP with TUBE IMP
  18. Another unknown tube
  19. Triode Bias 101
  20. Bogen MO-200A transplant /conversion
  21. 5U4 o bridge rectifier
  22. Choosing the right transformer
  23. V-Cap Help
  24. Older tubes sound better
  25. 6J7 preamp
  26. Menygue mini/music angel amp
  27. Driving a Behringer INuke Nu1000
  28. cathode follower ecc88 on 60volt
  29. Docs for Heathkit AA-23?
  30. 45 tube amp schematic
  31. Old TO-R s15u, Should i fix it?
  32. Tube ID
  33. VTL driver tube question
  34. Fun with junk EL84 SE
  35. Enclosure ideas
  36. Burn in procedure for NOS necessary?
  37. Strange Lorenz ECC81 12AT7
  38. Amplifier first start up; Plays tone of signal generator with no speakers!
  39. Reports of the death of Audiophool have been greatly exaggerated
  40. help me identify some vintage tubes // need suggestions for possible applications!
  41. Lowering cost of audio output transformer
  42. Source for transformers in Europe
  43. morgan Jones HT caps & Anode Loads
  44. Tuning Negative feedback
  45. Hickok reference 6L6 for calibration..
  46. SET-NO FEEDBACK amplifier performance
  47. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  48. Console Amplifier Pull:Voltages over Spec
  49. Help! My EL34B based amp arced at full volume.
  50. MUZAK 50's tube amp
  51. Tube break-in?
  52. Custom power tranny specs recommendations for 300B pse monoblocs
  53. mosfet source follower output stage.
  54. Winter upgrade project - new heating unit
  55. 6KM8 amp
  56. Power and output transformers to ground.
  57. Help with this schematic? B+? B++?
  58. What to do with this old amp? suggestions please.
  59. DIY CAT SL1 preamp
  60. Phase inverter, your comments welcomed!
  61. Basic Bias Question for PP Amp
  62. Oddwatt 5751/6550
  63. Please help me to identify Telefunken PCC ...
  64. Modification of 300B SE Amplifier
  65. 300B Tube and Amp Questions
  66. ST70 "Imposter"
  67. cathode follower question
  68. marconi tubes....can someone idntify these
  69. DeathTrap400 : : A Pretty Damn Good 300B Amp
  70. SOS: First Build, Lots of Hum
  71. 1959 Silvertone Syntronic Can Capacitor question
  72. KR Audio Marconi R valve amp?
  73. Distortion
  74. Tung-Sol 6098/6AR6 Substitution
  75. Dropout in RTP3 phono stage
  76. Audio Research EC-3 modification
  77. 300b all-DHT SET
  78. My first tube project !
  79. Trouble with homebuilt amp
  80. Music angel el34b problem
  81. Elecrolytic capacitor reforming
  82. The end of tubes?
  83. Two stages EL34 power amplifier
  84. 7199 replacement in AMPEX 6973
  85. IT coupled tube-SS hybrid amp suggestion- needs development
  86. Original Cary CAD-300se upgrades?
  87. Convert Integrated Tube Preamp to an amplifier
  88. McCurdy AM405 Schematics
  89. Looking for Neumann N149 power supply schematic
  90. B&K model 747 tube tester for EL34
  91. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???
  92. I need datasheet of 8753 tube, help me!
  93. New 6L6GC Project. DC -> LTP
  94. EL84 in UL
  95. 1953 revere amp conversion
  96. Manley transformer specifications
  97. Recommended 300B SE Amplifier Designs
  98. Found a new interstage coupling method (?)
  99. Amplifier Distortion (Northern Electric)
  100. when do filament supplies need to be floated
  101. gm70 filiment transformers
  102. Replacing 6922 Preamp Tube in ARC LS7
  103. Please educate me: Tube testing, the life test, and Grid Leakage
  104. 6AR6 6098 Triode PP Load Line
  105. music reference rm5-4 schematics
  106. S5 K-12G output trans
  107. Transformer center tap question
  108. EF86 + 4*EL84PSE
  109. solid state relays for plate load switching?
  110. Dont have a power transformer?
  111. Kora Equinoxe Triode or Blue Circle BC-21.1 preamp?
  112. Pre-Amp For my Tubelab Simple P-P
  113. Power Transformer Help
  114. Analog Metric 2A3 PP Kit
  115. Good, starter OTL kit
  116. Dual SE amplifier? - (not PSE) - Take two!
  117. Mysterious SE OTL headphone amp from China?!
  118. Inv. Futterman with gain stages between PI and O/P?
  119. PSU configurations for tube amp
  120. HP Model 712b Regulated Power supply
  121. Dynaco low Power Amp
  122. 300b power suply
  123. Very Strange Preamp Issue
  124. WTB: I am looking for a Freed 1400V or Chicago 1200V/1400V Potted Power Transformer
  125. tube transformer suppliers in Mercosur
  126. Please Help: 6CJ3 Damper Diode Tube as Rectifier Question
  127. time delay sophia electric
  128. Twisting the leads of filter choke
  129. This SPUD's 4 U
  130. I am Looking for tubes
  131. Thuan
  132. Nanjing 6V6GT ( 6P6P)
  133. Should I keep this old stuff?
  134. 300b
  135. ganged output transformers
  136. Holco H4P Resistors, Should I use them?
  137. 6BX8 curves, help !
  138. SANSUI AU-70 or 1000A???
  139. General Electric YTW-1 Tube Checker
  140. Ground or amp hum-which?
  141. need help to fix the "hiss" on my tube preamp
  142. Best SE interstage 1:1 for min. 15mA?
  143. Dual Single Ended Amplifier? - (not PSE)
  144. RIP Forum Member "Ivey"
  145. valves to replace opamps in cd player
  146. Replacing capacitors on Audio Research D40 power amp.
  147. No sound and low B+?
  148. Replacing capacitors on Audio Research D40 power amp.
  149. 2 Channel Tube Amp and Sub Connection
  150. EZ125 Amp Project
  151. Yaqin MS-22b Phono Amp
  152. First post and a couple P.P. questions
  153. adding a preamp to tube power amp
  154. 6SN7 6N8S preamp suggestions
  155. 300b polarity
  156. Electrolytic capacitor vs extra triode stage
  157. WE JAN 274B Dating
  158. EICO 666 Tester Help
  159. Hickock 550X signal voltage
  160. First Headphone tube amp kit to build??
  161. Anyone owns a Dynavox VR-307 Amplifier ?
  162. NOS potted Chicago Transformer 1BC-150
  163. capacitor voltage for tube amp power supply
  164. 808 SE Design Help!
  165. Why can't I build my own ARC LS-5 or CJ PV-12?
  166. Post-mortem on a 80 year old 2A3 amp
  167. 6e5p gm70 with 6d22s?
  168. 6L6-6V6-EL34-KT88-6CA7-EL84
  169. Scheme for SE amp
  170. $16,000
  171. Hybrid power amp
  172. Diagnosis please
  173. BK 707 Tube Tester Mods
  174. monarch 614
  175. Separate Filament and B+ Switches
  176. Dynaco Low Power with 12AY7's
  177. PTP kits available?
  178. Which OP transformer and materials?
  179. Power of Tube Amp and Transistors Amp
  180. testing tubes
  181. current servo not voltage.
  182. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  183. 300b filament
  184. DHT SE auto bias circuit
  185. Anyone try swapping 6SN7 w/ 6F8G
  186. Eliminating Cathode Bypass Caps In SET Amplifier
  187. Nano vacuum tube
  188. Help High Line voltage
  189. Switchable Amp Output?
  190. PCB or hardwire?
  191. 27 line pre amplifier
  192. Mystery tubes on FB?
  193. amplifier discussion
  194. Mikael Abdellah KT88 SE with Cornet2
  195. 5879 to 12AX7 conversion
  196. CCDA SE output stage?
  197. Bravo V2 tube headphone amp - high pitched noise?
  198. Preamp Grounding Question
  199. SE on 300B
  200. musical paradise mp 301
  201. Newbie plan
  202. Capacitor Voltage rating Question
  203. Can anybody identify this amp?
  204. Old RCA radio; can anyone ID this?
  205. Class AB2 - Kink, how and why?
  206. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  207. CCDA dissimilar triode preamp
  208. NOS NEGLECTED HIGH-END AUDIO TUBE
  209. GOSS C-core suppliers in UK/Europe
  210. Old radio -> tube amplifier
  211. Sowter 8650 in SE
  212. My Russian SET
  213. Raysonic vs. DIY tube amp?
  214. Which pins to use first?
  215. Bypass gain stage on K16LS amp
  216. Schematic help for a Pilot 505 amp please
  217. Question re: Distortion in triode gain stage
  218. Newbie needs help
  219. Marantz Model 9
  220. Is my power transformer bad?
  221. japanese 6v6 amp on youtube, anyone got the link?
  222. First attempt at tube amp.
  223. 6p3s,6N1P,6j1p
  224. 6bq5 p-p diagnosise
  225. MFA Lumi suddenly whistles (on bench)
  226. Pure tetrode and negative g2
  227. ECC85, EL84 tube amp please help.
  228. Pentode buffer.
  229. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  230. Help restoring old Maas-Rowe amp
  231. Early Sansui Valve Amp
  232. mismatched transformer impedance question.
  233. Second-hand or NOS tubes?
  234. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  235. Looking for High voltage double triode
  236. Will this ebay cover fit my Scott 272 integrated amp?
  237. My new find
  238. Thordarson Dual Tone Control
  239. samsung experiments with "tube sound"
  240. PP OPT design
  241. Heater voltage drops?
  242. WE448A data
  243. How come signal input capacitors are not on every amp?
  244. Any body can help to identify this pair of OPTs.
  245. tubelab SE component mounting
  246. Pre-amp for Tube Sound
  247. Audion tube amp capacitor questions
  248. Capacitor Substitution
  249. Hello, looking for advice on a tube project...
  250. Testing my Tube Tester

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